Sanding machine



Jan. 1, 1935.

' D. s. OAKLEY SANDING MACHINE Filed Jan, 22, 1934 v 4 Sheets-Shes?l l INVENTOR Jan. l, 1935. D. s. OAKLEY 1,936,520 u y SANDING MACHINE Filed Jan. 22, 1934 4 Sheets-Sheet 2 @3 "hll "In, @fia Immun-ig.-

INVENTO ATTORNEY D. s. OAKLEY SANDING MACHINE Filed Jan. 22, 1934 4 Sheets-Sheet 3 NEIN:

m'dmf/g/ Jan. l, 1935. D s AKLEY 1,986,520

SANDING MACHINE Filed Jan. 22, 1934 4VSheetS-Sheet 44- Wz'a a/sjg @a muy polisher for llat surfaced Patented Jan. v1, n 1935 ,I-.fjj1,`9sc,5i2o"`hf o o MACHINE o David Oakley, Brirstchflfenn. o o v npplicationciitryzz, 1.934, serial No. 707,821 A 7 f (ci. 51,-41'43) 1 n '4 The invention, relates to a" sanding machine and more especially to a double belt sander and :and irregular-shaped wood materiaL/ o l y t The primary `object of theinvention is theprovision of a machine of :this character, wherein' a pair of sanding `belts of the` endless or continuous kind are supportedjsideby side andare adjustable toward or away fromv each other in this vto give to such material Va smoothfandV a finished surface, the sanding and polishingjoperation being carried forth with rapidity and accuracy and without manual labor, as'the machine is automatically operated iand is susceptible of adjustmentso as to have'it operate true. 1

Another object of theinvention is they provision `of `a` machine "off this character, wherein" a number of controlsvare in association therewithh so that the `work to be operated upon can be brought into position with accuracy for the sanding of the same and also the polishing thereof and the parts' of the machine can be properly settfor the eicient operation of the same. Additionally, the sanding and polishing elements will of in the machine. o o l A further object of theV inventionlistthe `provision of a machine ofthis character, wherein the' sanding and Vpolishing elements can be readily introduced and removed to Vand from they ma-A chine as the power and guide'pulleys'for the same are susceptible of movement by controls',lwhere-,l by theymay be separated to permit the removal of the sanding and polishing elements or the introduction of the same and also thepositioning of these elements with` relationto each other so that the work confronting `them can be"subjected to coarse or fine sanding action according to the requirements in the finishing `of such work;

`A still Afurtherobject of the invention'is the provision of a machine of this character," wherein adjustments may be had of alllcoacting parts ,i for theisuccessful andaccurateworking of the `visibnfof a machine 'of Acharacter?which`is comparatively simplef` in" its Y construction,` thoroughly reliable V'and eicient in itsloperation, susceptible of positive control, capable of minute adjustment for accuracy inthe working of such machine,` strong, durable, and comparatively inexpensive to manufacture. o *With these and other objects in view, the inventionI `consistsin the features of` construction, combination and arrangement of "parts as will behereinafter more fully described in detail, illustratedin the accompanying drawings, which disclose the preferred embodiment of the inven,` tion, f and pointedfout in the claims hereunto appended. In'the accompanyingdrawings: v

Figure 1v is`` aside elevation of aL-machine constructed in accordancewith the invention. 7

Figure 2 s a fragmentary side elevation of one: end portion ofthe machineand the same being part1yin'section.` i 7 i `Figure 3 is `a fragmentarypend elevation showing certain parts brokeniaway `and sectioned for illustrating `detail adjuncts. Figure "4 is `a fragmentary plan viewipartly in section ofthatportion shown in Figure 2, with the electric motor detached.` Y y I Figure 5`is an enlarged fragmentary vertical transverse sectional View through the other end portion of the] machine andshowing certain ofl i o o `the parts infelevation; be assured of a maximum life in the zuse there- Figure 6 is a plan viewthereof. ,ligure 7 is a fragmentarysectional view on the'line '7--7V ffnigure 6 looking in the direction 'of thearrows.,` -y` i o "Figure8" ils a fragmentary sectional vi'ewonthe line84-8 ofFigure 6 lookingjinthe directionof the arrows. L f y Figure 9 isa fragmentary lsectionalfview on the line `9,-9 of Figure thearrowsw l. FigurelO is a fragmentary detail sectional view on the line 10-,10of Figure 8 looking in the directionof the arrows. o y

"Figure -`11 is a fragmentary o enlargedside elevationf partly vertically sectioned,` of the work supporting parts of the machine."

6V looking the `direction of o Figure 12 isan end elevation thereof and part-` ly in section. H

Figure 13 isja sectional View on the line 13--13 of Figure 11 looking in `the ndirection of the arrows. v' Y o Figure 14 is a fragmentary top planview of one of theslidable tracks of thework supporting sec-j` tionandtted therein.,` f g Figure 15 is a fragmentary vertical transverse sectional fviewfo'n thelune 15-1'5 of Figure 12, f

Figure 16 is a fragmentary side view showing in detail the table stop as indicated in Figure 15.

Figure 17 is a top plan view of one of the track guideway pieces.

Figure 18 is a top plan View of one of the slidable tracks.

Figure 19 is a side view thereof.

Similar reference characters indicate corresponding parts throughout the several views in the drawings. y y

Referring to` the drawings in detail, the machine comprises the end power motor and guide pulley stands A and B, respectively, and the intermediate work supporting stand C, these being hereinafter fully described in detail.

The power motor stand A has arranged thereon the opposed stationary and shiftable electric motors 10 and 11,1'espectively, each being of-a standard reversible type and individually controlledthrough push button start and stop switches 12 andreverse drive switches 13, respectively, these being suitably positioned adjacent to the shiftable motor 1 1 for manual control by the operator of the machine.` The driving shafts 14 of the motors 1,0 and 11 have fixed thereto, inwardly of said motors, power pulleys 1 5 which are of suicient weight to functionindirectly as fly wheels and support endless sanding belts 16and 17, respectively, arf,

ranged side byfside or edge to edge, andone of these is, a coarse sanderV and the other a fine sander. K N

y'.llrie` stationary motor 10 is superimposed upon the bearing 18 unitary with the stand A, while the shiftable meter-11 is .superimposed upon a slidebaselQ fitted within vguides 20 formed with the standi,V one Aguide being fittedk witha removable orreplaceable wear piece-21. Carried bythe slide base is a toothed rack 22 having meshing therewith a rack pinion 23 on av turning stem 24 journaled` in said stand A and having `one end ,extended beyondthe said stand, to which is fitted a'hand wheel 25,1501.'l the `manual turning of; saidstern 24 and in this manner the slide base 19. can be moved tok shift the motor-11 toward or away from the stationary motorV 10, as should be clearly apparent. The base 19 is provided l with Aah'slot 26 infwhich is fitted a binding lorI 'n set srcrew27, thesame being threaded into the stand Aand such screw is.L for the purpose of`k locking the base Vv19in .its adjusted position, as

will .be apparent,

,The pulleysgl have'resilient anti-slipping tread'or peripheral contact surfaces 28 to pre-` Vent theSslipping-of the belts 16 and 17Y thereon, these belts rbeingformed withthe inner sanding V4surfaces 29. A' 'y ,l

The stand B supports the opposedlightweight adjustable'guide pulleys 30,v each preferably made from aluminum and having Aits hub 31 equipped withy ballmbearings 32, and trained over these pul-k` leys 3'0* `are the'beltsn16 and 17, the peripheries of the said pulleys being provided with the resilient anti-slipping orlfrictiornal Contactsurfacesvv for thesaid belts.l The journal's34 furthe pulleys 30 are supported inbearings 35, each swinging ona center pivot 36 for arcuate adjustment theretherespegtve Vmet!piiiorlsl 'on the turning stems 42 and 43, respectively, the latter being suitably journaled in the stand B and having at their outer projected ends the hand wheels 44 so that the same can be manually turned for the shifting of the rails 38 and 39 which function to move the bearings for the tightening of the belts 16 and 17 on the pulleys 15 and 30, respectively. The slide base 37 has journaled therein a turning stem 45 having at its outer end the hand wheel 46 and at its inner end the. rack pinion 47 which meshes with a toothed rack 48 lfixed to the rail' 38 and thus it will be seen that by turning theistem 45 the slide base 37 can be shifted to ,bring the bearing 35 carried thereby toward or awayfroin the other bearing 35 opposite thereto. v The slide `base 37 has formed therein the slot 49 accommodatinga set screw 50 so that the said base '37 can be made fast in its adjusted position onk therail 38. Each bearing 35, at opposite sides of the pivot 36 therefor, has formed therein the arcuate slots 51 receiving the. set `screws 52 which are engaged in the base 37 so that when the said bearings 35 are turned in the pivot 36 they can be locked in their turned position and the purposelof the turning' of the bearings 35 is to align the pulleysqS with the pulleys 15 so that they said belts 16 and 17 thereon will travel through and align parallel with each other.

Swiveled 'in the base 37 isa screw mount 53- carryingjthe adjusting screwv 54, the saine being threaded into a swiveled connection 55 on the bearing 35 and thus `it will be seen that by turning the screw V54 the said bearing can be turned, itbeing understood,A of course, that the set screws 52 have been loosened. The other bearing 35 has the screwinount 56 swiveled on the rail 39 and the l adjusting screw-57 engaged in this mount and also in the swiveled connector 58carried by the said adjustment of this screw 57the bearing 35 afsetV with relation to each other for the parallel aligning of the belts 16 and 17, as should be obvious. y t

The set screws 59 alike to the screws 52 are engaged inthe rail 39 and in contradistinction to the engagement of the screws 52 inthe base 37. The work supporting stand C includes a pair of spaced leg pieces 60 in which are tted adjustable uprights 61, each working in a guideway 62 formed in its p. companion leg piece 60 and carryingy a toothed rack63 meshing with a rack pinion 64.

fixed toa driven shaft 65 journaled in the leg piecesYG-I), so that said uprights 61 can be moved in unison vertically. The shaft 65 carries a worm gear-66meshing with` a worm screw 67 oncaf-turningstem 68, the same being journaled in apenter web 69 between the leg pieces 60 and a bracket 70 .and carrying at its outer 'end a hand wheel 7l'so that the stemc'an be manually turnedfor the adjustment ofsaid uprghts.

'Ilieuprights 61, at their upper ends, are formed with heads 72 to which aremade fast guides 73 for movable tracks 74 having the treads 75 engaged bythe Wheels 76 and 77, respectively, of a movable carriage 78, the wheels 76 being. peripherally grooved, while the wheels 7-7 have straight peripheries,j and such wheels have their traction on thetreads of the tracks 74` The carriage 78 has arranged-thereonvthe slatted work bed 79 for accommodating work to be acted upon by the sanding belts 16 and 17., The tracks 174are formed;l Withthe upstanding hangers 80 for'. taothedfracks .81'. with which mesh the rack pin- 'Cil 1 1, machine. It will be apparent that when the handle bar is dismantled asbefore stated, or in norment, or new ones substituted, as theoccasion e Also when these belts become dull or Worn by reason of their travel in a given direcions 82, these beingxedto a shaft 83`journaled in bearings 84 carried by the guides 73, thelshaft" 83 being fitted with a beveled gear l85 meshing with a beveled pinion 86 on a turn shaft87`journaledin brackets 88 xed toone of the guides 73, the shaft 87 at its outer end being tted with a hand crank 89` so that` it can be manually 16 and 17.

turned for the shifting of the tracks .,lgitolocate these for a wide range of the shift ofthecarriage 78 transversely of the path of travel of the belts The carriage 78 at the working side of the maseparable coupling 92 of such bar 90 its sections can be freed so that the same can be pushed apart to permit the operator or attendant of the machine to more closely approach the belts 16 and 17 should the carriage be extended'toward such operator or attendant or beyond that side of the malcy,` it will permitthe manual shiftingof the carriage for the presentation `of the Work thereon to the belts 16 and 17 during tion of the machine.

At each side of the carriage 78 there is mounted a stop 93, the portion 94 being adapted for conl tact with a bumper95 on one lguide* 73. to limit the vmovement of the said carriage in one direction, while the portion 96 of the stop 93 coacts fwith a bumper 97 on 'each track `74 so that the site ends of the companion guide 73 for said track and thus restrict thethrow of such-track in re-y4 l 99 in which arepivoted,` at100, reversely set` carriage will be restricted in its movement in the reverse direction. l

j Each track 74 has tted thereto resilient bumpers 98, these being arrangedbeyond ODD@- verse directions, the said bumpers 98 being setto prevent the overriding ofthe rack on said track74. Provided'on the motors 10 and l1`1 are bearings L-shaped brake levers 101,thesehaving the brake shoes 102 for engagement withthe inner surfaces of the pulleys 15 and 30 so that such pulleys can `be selectively brought to a" standstill. The

` levers are normally held in `neutral position by means of springs 103 and operative upon these levers is a push and pull rod 104 which, through the connection 105, will throw one of the brake levers 101 from neutral to braking position when pushed upon, and through the connection 106 the other brake lever can be moved from neutral to braking position on a pull upon the said rod 104,

the free end of the latter being provided with a handheld 107 for` convenientV 4manipulation thereof.

It Will be understood that `the motors 10` and 11 are selectively started and stopped at thewill of` theoperator of the machine and when operating e will impart motion tothe belts 1,6 and' 17 so that the latter will act `upon the work presented by the l work supporting stand as the material to be operated `upon is presented to the belts at the under e V'faces of the upper stretches thereof. i

It should be apparent that by Vadjustment of the `pulleys 15 and 30 the same` canbe `separated 'or the sanding opera-v may require.

tion the motors can be reversed, thus reversing the direction of travel of such belts so that fur-` ther service of the same may be had for sanding and polishing purposes. It is desirable to have the two belts 16 and 17 travel in opposite directions although, as indicated, they may both travel in the same direction and reverse as to direction at thewill of the operator of the machine.

By reason of theanti-slipping surfaces on the pulleys of the machinethe abrasive side of the belts 16 and 17 will be prevented from coming in contact withV the metal from which these pulleys are made and at the same time such belts will be prevented from slidingupon the pulleys. l

The slatted work bed 79 `is readily adjustable vertically and transversely to the path of travel of the belts 16 and 17 and thus will properly present the work to the abrasive side of such belts for the sanding and polishing of the work, as should be obvious; l

What is claimed is:

1 A machine of the character described comprising a pair ofy end stands, an intermediate Work supporting stand with respect thereto, motor driven' abrasive belts supported by said end stands to be disposed in spaced edge to edge relation to each other, means for adjustment of such Vbelts laterally toward and away `from each other` to vary the edge to edge relation of the same, means independent'.` of the last-named means for truing the belts, one with respect to the other, motors for independently driving each belt and reversing the direction of travel thereof, an adjustable` Work bedcarried by the intermediate stand and movable vertically and laterally` with respect to said belts, manually operablemeans `for con-` trolling the movements of the work bed, bumpers associated with the bed to limit the movements thereof transversely with respect to` said belts, l meansffor independently braking the momentum` supporting' stand with respect thereto,` motor driven abrasive belts supported by said end stands to be disposed in spaced edge to edge relation to each other, means for adjustment of such belts laterally toward and away from each otherfto vary the edge to edge relation of the same, means independent of the last-named means for truing l the belts, one With respect to the other, motors for independently driving each belt and reversing y the direction of travel thereof, an adjustable work bed carried bythe intermediate stand and` movable vertically and laterally with respect to said belts, manually operable means for controlling the movements of the work bed, bumpers assol ciated with the bed to limit the movements thereof f transversely with respect to said belts, means for independently braking the momentum of said i belts, a single control forsaid braking means, and

manually operated means for holding the belts in their shifted positions. DAVID S. OAKLIEFSZ."` 

